Die-rolling mill



Dec. 14, 1937.

- A. c. CUMMINS DIE ROLLING MILL Filed March 21, 1954 2 Sheets-Sheet l \"JIIIIIIIIIIIIIIIIIIHHF" 1" LT rim V liwenfor: 6105M C .'C uMM/Ns,

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Y Dec. 14, 1937. A. c. CUMMINS DIE ROLLING MILL 2 Shets-Sheet 2 Filed March 21, 1954 Patented Dec. 14, 1937 UNITED/STATES,-

PATENT caries 4 Claims.

This invention relates to die-rolling mills, one of the objects being the provision of an improved means for adjusting the cooperative rolls of such mills so that their respective matrices ,may be mutually registered. Other objects may be inferred.

Referring to the drawings:

Figure 1 is a top view of a mill illustrating the principles of the invention.

Figure 2 is an end view.

Figures 3 and 4 are horizontal and vertical cross-sections of one of the motors included by the mill. I

Figure 5 is a cross-sectional view of the dierolling rolls. r

The mill illustrated by the above includes a frame I in which two cooperative rolls 2 arejoumaled. As shown by the cross-sectional view,

these rolls are individually provided with cooperative recesses or matrices 3 which are shaped according to the requirements of the work being rolled.

Since these matrices cooperate to produce the work, it is obvious that those of the respective rolls must be mutually registered if the work is to have the proper shape. Heretofore, the rolls of such a mill have been driven by one motor through a conventional pinion-stand. This requires an adjustable coupling between one of the rolls and the pinionestand to provide for the angular adjustment of this roll relative to the other for the purpose of registering the respective matrices. character that the mill must be stopped each time an adjustment is made, and it also has the disadvantage that its range is limited due to its necessarily small diameter. The present inven tion is characterized in that it permits this adjustment to be made through an unlimited range 49 while the mill is operating.

Referring again to the drawings, each of the rolls 2 are individually driven by electric motors 4 and 5 through gear boxes 6. These gear boxes are not absolutely necessary, but are ordinarily 4:, required because of the mechanical problem of driving therolls 2 at relatively slow speeds.

The motors 4 and 5 are of the alternating current synchronous type, and are connected to the same line so as to operate synchronously. By

50 this means the rolls 2 are driven with as positive a speed relationship as they are when mechanically interconnected by a pinion-stand.

One of the motors, 5 for instance, has its stator windings l rotatively mounted by a frame 8 that 5 is anchored to the floor. These windings may This coupling is necessarily of such be carried by a ring 9 having gear teeth It) cut in its periphery and meshed with a worm ll driven by an electric reversing motor I 2.

It is obvious that the-above described motor construction provides for the angular adjustment 5 of the rolls 2, operation of the motor l2 turning the stator windings I of the synchronous motor 5 and consequently changing the mechanical relationship of the rolls, 2. This may be done while the motors are operating and the rolls 2 are turning, there being obviously no necessity for the shut-down, formerly required. Furthermore, the motor l2 may be operated to turn the stator windings through a complete revolution so that the possible adjustment range is unlimited. 15

It may be assumed that the motors will normally operate in synchronism. The reversing control for the motor l2 may, and preferably should, be located at a point convenient to the mill operator. Then if the appearance of the 20 work being rolled indicates the necessity for a change in the relationship of the rolls 2, the operator may control the motor 12 so that it drives the stator windings vI in one direction or another. This changes the mechanicalrelationship of this 25 stator respecting the stator of the motor 4, thus also changing the mechanical relationship of the rolls 2. r

Although a specific example of this invention is disclosed in accordance with the patent statutes, 3o

it is not intended that its scope be limited exactly thereto, except as defined in the following claims.

I claim:

1. A die-rolling mill including the combination of a frame, cooperative rolls journaled in said frame, said rolls being individually provided with cooperative recesses or matrices which are shaped according to the requirements of "the work being rolled, a synchronous electric motor arranged to drive one of said rolls, a second synchronous electric motor arranged to drive the other of said rolls and means for rotatively mounting at least the stator windings of at least one of said motors so as 'to thereby efiTect angular adjustments of said rolls.

2. A die-rolling mill including the combination of a frame, cooperative rolls journaled in said frame, said rolls being individually provided with cooperative recesses or matrices which are shaped according to the requirements of the work being. so rolled, a synchronous electric motor arranged to drive one of said rolls, a second synchronous electric motor arranged to drive the other of said rolls, means for rotatively mounting at least the stator windings of at least one of said motors 5s so as to thereby eflect angular adjustments of said rolls, and adjustable means for restraining rotation of said stator windings.

-3. A die rolling mill including the combination of a frame, cooperative mils journaled in said frame, said rolls being individually provided with cooperative reoesses or matrices which are shaped according to the requirements of the work being rolled, a synchronous electric motor arranged to drive one of said rolls, a second synchronous'electric motor arranged to drive the other of said rolls, means for rotatively mounting at least the stator windings'of at least one of said motors so means for turning the stator of one of said mo- 19 tors relative the stator of the other, whereby to permit roll' angularity adjustment of the mill. ALDEN C. CUMMINS. 

